Minecraft

First you will need alot of blocks (cobblestone, dirt, ect)10 buckets of lava and 1 bucket of water
Next dig a one block deep hole an two blocks wide
Then place some blocks around your hole so that the hole is two blocks deep
After that you put two buckets of lava in the bottom of the hole
Then you put the bucket of water on one of the blocks that you placed and watch the lava turn to obsidian
Then you try to figure out how to build the rest just make sure that you make it 4 (including corners)wide and 5 tall(including corners) and make sure that you place the water on the block above the lava then take back your water

I was all wondering what glowstone could do so I did this:first I dug three squares down. Then I got in the hole. Put glowstone on top then I used a ender pearl. I threw it on the glowstone on top then I saw all of the cave systems below .